Door lock



Feb. 3, 1942. H. e. VOIGHT DOORLOGK Filed July 12, 1940 2 Sheets-Sheet l forced Patented Feb. 3, i942 DOOR LOOK Henry G. Voight, New Haven. Conn, assignmto Sargent a: Company, New Haven, Conn, a corporation of Connecticut nppumion July 12, 1910, Serial No. 315,109 4 Claims. (01. 79-151) This invention-relates to door looks or latches,

and more particularly to a lock for a front door of a building, although it will be understood thatit may be employed in any location in which is desired alock having the characteristics embodied in the present structure. Y

The invention relates particularly to a socalied tubular lock, or a lock having a tubular or cylindrical casing which -may be inserted through a cylindrical opening made in the edge of the door. Such locks must comprise a relatively small number of parts, and the mechanism RBSSUED- Sweeteplunger, and providing a slide within the lock and adjacent the bolt stem or yoke, which slide acts to move the dog to inoperative position, and

which slide is itself actuated by the rollback of I either the inner or outer knobs.

' A still further object of the invention is provision of a door lock of the character described in the preceding paragraphgin which the outer knob may befdogged against turning by mechathereof must be relatively simple in order that x it maybe housed in the relativelfsmall space available in the cylindrical case:

A front door lock or latch is usually provided with a latch bolt which is prevented from being by a tool inserted between the door and dogging member which engages behind jamb by a thehead of the in turn being controlled by a plunger which engages and is held in retracted position by the strike plate of the lock. Also in a lock of this character it is desirable to be able to dog the outside, knob, so that the latch bolt may not be retracted from the outside by means of the knob,

while at the same time providing key-operated means at the outside of the door for retracting the latch bolt. c

When the door is on latch or when the outside knob is dog ed, it is desirable that the inside knob be free to turn to retract thelatch bolt, and also desirable that the latch bolt may be free for retraction by contact with the strike plate in order that the door may be closed. In order to provide all of these functions in a so-called tubular lock, it is necessary to arrange the required mechanism in compact relation, as well as to use the smallest possible number of parts.

One object of the above invention is the provision of a door lock of the character described which comprises a relatively small number of parts and which may be arranged in a compact space whereby the lock mechanism may be carried in a tubular case.

A still further object of the invention is the provision of a front door lock having all of the functions required of a lock for this location,the mechanism of which is so arranged that it may be housed in a tubular or cylindrical case.

A still furtherobject of the invention latch bolt, the dogging member nism at the inside of the door, and providing a' key-operated lock in the outer knobwhich ac- ,tuates the spindle of inner knob so that the latch bolt may be retracted from the outside of door by the proper key.

To these and other ends the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawings: Fig. 1 is a front elevational view of a trasmentary portion of a d Oi' provided with a lock embodying my invention;

isthe' provision of a door lock having a latch bolt which pomtion when the door is the doss s member is held in protracted closed by a dogging member,

F151;; 2 is an edge view of'the parts shownin l ig. 3 is a sectional view on line 3-4 of Fig. 2; Fig. 4 is aview of'the lock withthe cover of the ease removed to show the interior mechathe parts in another position; i Flg.6isasectionalviewonline6tofl?ig.3; Fig. 'I is a sectionalview on line 1-1 of Fig. 1; Fig. 8 is a sectional view online H of Fig. 4; Fig. 9 is a perspective view of the latch bolt and yoke or stem attached thereto;

Fig. 10 is a perspective view of the latch-dogging member;

Fig. 11 is a p rsp tive view of the auxiliary yole or stem which releases the dogging member; an

Fig. 12 is a perspective view of the dog-controlling plunger.

To illustrate a preferred embodiment of my invention I have shown a fragmentary portion of a door ll upon which is mounted my improved.

turned portion I1, and a shoulder I6 spaced forwardly of the portion I1. As will be explained later, the laterally turned portions or lugs II are designed to be operated by the rollbacks of the inner and outer knobs to withdraw or retract the latch bolt in the usual manner.

The casing portions I I and I 2 are provided with openings in which are rotatably mounted hubs 26 and 2|, which hubs carry rollbacks 22 and 22", respectively, these rollbacks standing forwardly of the lugs II on the bolt stem. As shown in Figs. 3 and 4, the hub 20 is provided with a polygonal opening to receive a correspondingly shaped spindle 23, which spindle is in turn received in a polygonal opening in the inner end of the shank 24 of the outer knob 25. The hub 2| receives a polygonal spindle 26 which is threadedly received in the shank 21 of the inside knob 28, the knob shank being secured against rotation on the spindle when it is properly positioned thereon by means of the set screw 29. As shown in Fig. 3, the spindle 26 of the inside knob is provided with a stem extending into and through the spindle 23 of the outside knob, this stem comprising a threaded portion 30 which threadedly and rotatably engages the spindle 23, a shank portion 3| and a flattened end portion 32, the purpose of which will be explained hereinafter. It will be understood that the inner spindle 26 is at all times rotatable independently of the spindle 23 of the outside knob .25.

At the inside of the door is mounted the rose 35, while a similar rose 36 is mounted at the outside of the door, the latter carrying a tubular portion 31 which rotatably receives the knob shank 24. The knob 25 is threadedly secured upon the knob shank, as shown at 38, a set screw 39 looking the parts against rotation, which screw is covered bya shield 40 disposed between the tubular portion 31 of the rose and the knob. Also, as shown in Fig. 3, the shank 24 is provided with an annular recess 4I within which are received keys 42 of annular semi-circular form, the keys being held in the recess by a split ring 43 so as to secure the knob shank and knob within the portion 31 of the rose. It will be understood that after the spindle comprising the outer portion 23 and inner portion 26 is positioned within the door, the outer knob and rose may be placed against the side of the door, with the spindle portion 23 received in the knob shank, and the parts secured in place by screws 44 (Fig. 7) passed through the inner rose 35 and secured in threaded lugs 45 carried by the outer rose, thus securing the outer rose and knob to the door with the knob free to rotate in the portion 31.

As also shown more particularly in Figs. 3 and 6, a key-operated lock 46, which may be of the ordinary pin tumbler type, is provided in the outside knob 25, this look having a rotatable key plug or barrel 4'Iwithin the knob shank 24, this'barrel having at its inner end an elongated opening 49 which loosely receives the flattened end portion 32 of the inner spindle. tive size and shape of the opening 49 and spindle 32, as will be seen from Fig. 6, will allow partial rotation of one of these parts without affecting the other; that is to say, there is a certain amount of lost motion between the two. As the spindle portion 32 is secured to the inner spindle, which is in turn fixed to the inner knob 28 by means of the screw mit suflicient rotation of the inner knob to retract the latch bolt without movement of the key plug 41. However, when the key plug 41 is The rela-.

rotated, it will, after a small initial movement, pick up the member 32 and through it eifect rotation of the inner spindle 26 and thus retract the latch bolt.

From reference to Figs. 4 and 5 it will be observed that the rollback 22 is larger than the rollback 22, so as to project forwardly therefrom, and this forwardly projecting portion is provided with a notch or recess 50 adapted to receive a detent 5I on a dogging plunger 52 movably mounted in the casing portions II' and I2, and having threadedly secured thereto a button or fingerpiece 53 projecting through the rose 36 at the inside of the door. By manipulating the member 53, the plunger may be pushed inwardly or pulled outwardly to eifect engagement or disengagement of the detent 5| .in the notch 56. This serves to dog the hub 26 carrying the rollback 22, and therefore dogs the outside knob against turning, while leaving the inside knob free to turn. It will be understood that this dogging mechanism is shown in inoperative position in Fig. 3, and to move it to operative position it is only necessary to push inwardly on the member 53 so as to move the plunger 52 to the left, as shown in this figure.

The portion I2 of the lock case is provided with a post 55 which receives the screw I2, and within this post is mounted a spring-pressed ball detent 56 which engages a member 51 secured to the dogging plunger 52 to releasably hold this plunger in its outer or inner positions to which it may be moved.

The latch bolt shown in Fig. 9 is normally urged to projected positon by means of a spring 60 acting against the post 55 and received upon a member 6| secured to the latch bolt. In order that the latch bolt may be dogged against being forced when the door is closed, a dogging member 62 is provided, which dogging member has an opening 63 within which is received the reduced upper end 64 of the post 55 to pivot the dogging member thereo This member is provided with a laterally turned end or detent portion 65, which when in operative position engages behind a shoulder 66 on one of the legs of the yoke or stem of the latch bolt. This dogging member 62 is normally urged to operative position by the spring 61, one end of which engages the dogging member below the pivot and the other end of which bears against the lock casing.

In order to hold the latch dogging member in inoperative position when the door is opened so 29, this lost motion will per- Figs. 3 and that the bolt may be retracted by contact with the strike, a dog-controlling plunger III is provided, which plunger, as shown more especially in 12, is provided with a shoulder 1I engaging behind the head of the latch bolt, and a cam member I2 adapted to engage above the portion65 of the dogging member 62, this dogcontrolling plunger being normally held in projected position, shown in Fig. 3, by a spring I3 received within an opening in the plunger and carried by a post 74 secured to the post 55. .As will be seen from Figs. 4 and 5, when the door is opened and the plunger is projected behind the latch bolt, as shown in Figs. 3 and 4, the cam portion I2, by engaging the laterally turned end 65 of the dogging member 62, holds the dogging member downwardly againstthe tension of the spring 61 so that the laterally turned end 65 does not engage behind the shoulder 66. When, however, the door is closed the dog-controlling plunger 10 is held in retracted position by contact with the strike, as shown in Fig. 5, and the cam 12 is moved out of engagement with the member 65, allowing the spring 61 to move this member upwardly behind the shoulder 66, and thus prevent the forcing of the latch by a tool inserted between the door and the jamb.

It is, of course, necessary to provide means for moving the dogging member 62 to inoperative position when it is desired to retract the latch by either of the knobs or by a key. To effect this .result an auxiliary bolt stem or yoke is provided,

as shown in Fig. 11. As illustrated this member comprises leg portions 15 and 16 connected at their rear ends by the arcuate-shaped member 11, which member is provided with laterally extending ears I8 and 19. This member is adapted to lie over the legs of the bolt stem between the shoulders I8 and the lugs l1, whereby the portions 18 and I9 lie against the lugs I1, and between these lugs and adjacent surfaces of the rollbacks 22 and 22 The leg 16 of this member carries a pin 80 which is adapted to engage the tail 8| of the dogging member 62, whereby when this auxiliary stem is retracted or moved to the right, as shown in Figs. 4 and 5, the tail piece 8| is moved upwardly, thus swinging the member 62 to move the detent portion 65 to inoperative position.

It will be observed that the free end portions of the members 15 and I6 do not contact the shoulders l8 when the members I8 and 19 are against the lugs II, but on the other hand there is a lost-motion connection between these two parts. Thus if, when the door is closed and the parts are in the position shown in Fig. 5, it 'is attempted to force the latch bolt 15, the retraction of the latch bolt will be arrested by the member 65 before the shoulders l8 strike the forward ends ofthe legs I5 and 16, so that the retraction of the latch bolt is arrested before any movement of the dogging member 62 by the pin 80. It will also be apparent that the members 18 and I9 lie in front of both rollbacks 22 and 22 the portion 11 embracing the hubs 20 and 2|, so that whether the latch is operated by means of the inside knob, the outside knob, or by means of the key (which operates the inside knob spindle), the auxiliary stem or yoke will be actuated and will kick off the dogging member 62.

It will also be apparent that the plunger 52 may be moved to the left from the position shown in Fig. 3 until the detent 5| engages in the notch 50 to dog the hub 20 and prevent the opening of the door by the outside knob. At this time the latch will be free for operation by the inside knob, this being, permitted by the lost-motion connection between the spindle portion 32 and the opening at the forward end of the key plug 41. At the same time the keyplug is connected to the spindle 26 of the inside knob, so that by means of the key, the key plug may be rotated, and rotate the spindle 26 to retract the latch bolt.

Thus I have been enabled to provide with a minimum number of parts and within a compact space a door lock which has all the functions required of the usual front door lock, and which may be contained within a tubular case so that it may be readily mounted upon a doorwithout time-consuming mortising operations.

While I have shown and described a preferred embodiment of my invention, it will be understood that it is not to be limited to all of the details shown, but is capable of modification and variation within the spirit of the invention and within the scope of the appended claims.

What I claim is:

1. In a door lock, a case, a latch bolt reciprocably mounted in the case, a bifurcated yoke connected to said bolt, said yoke having lugs at a rear portion thereof and shoulders spaced from said lugs, a dogging member pivotally mounted in the case and adapted to engage said bolt to dog the same against retraction when the door is closed, an auxiliary yoke mounted on said bolt yoke between said lugs and shoulders, and having portions abutting said lugs, and knob-operated rollbacks in the case adapted to engage said lastnamed portions to move said auxiliary yoke and said bolt yoke rearwardly to retract the bolt, and said auxiliary yoke having a part engaging said dogging member to move the latter to inoperative position.

2. In a door lock, a case, a latch bolt reciprocably mounted in the case, a bifurcated yoke connected to said bolt, said yoke having lugs at a rear portion thereof and shoulders spaced from said lugs, a dogging member pivotally mounted in the case and adapted to engage said bolt to dog the same against retraction when the door is closed,

an auxiliary yoke mounted on said bolt' yoke between said lugs and shoulders, and having portions abutting said lugs, and knob-operated rollbaeks'in the case adapted to engage said lastnamed portions to move said auxiliary yoke and said bolt yoke rearwardly to retract the bolt, said auxiliary yoke having a part engaging said dogging member to move the latter to inoperative position, said casing being of tubular form and insertable through an opening in the edge of the door.

3. In a door lock, a case, a latch bolt reciprocably mounted therein, inner and outer coaxial independently rotatable spindles, a knob upon each of said spindles, means for dogging the outer knob against operation, a key-operated lock mounted in the outer knob, means connecting each of said spindles to the bolt'for operating the latter, said outer spindle being hollow, and means secured to the inner spindle and extending through the outer spindle for connection with said lock whereby the latter may operate the inner spindle when the outer knob is dogged.

4. In a door look, a case, a latch bolt reciprocably mounted therein, inner and outer coaxial independently rotatable spindles, a knob upon each of said spindles, means for dogging the outer knob against operation, a key-operated lock mounted in the outer knob, means connecting each of said spindles to the bolt for operating the latter, said outer spindle being hollow, means secured to the inner spindle and extending through the outer spindle and having a lostmotion connection with said lock whereby the latter may operate the inner spindle when the outer knob is dogged, and the outer knob may have a limited rotation independently of the inner spindle. HENRY G. VOIGHT. 

